Chemistry Of Life

Ashlee Cheatley & Alyeah Chandler

Chemistry Of Life

Ashlee Cheatley & Alyeah Chandler

Water & It's Characteristics

Cohesion is the property of like molecules that stick to each other due to mutual attraction.

Adhesion is the property of different molecules or surfaces to cling to each other.

Surface tension is a contractive tendency of the surface of a liquid that allows it to resist an external force

Polarity the property of having poles or being polar.

pH The pH scale measures how acidic or basic a substance is.

Cohesion, Surface Tension, and Adhesion

Cohesion causes water to form drops, surface tension causes them to be nearly spherical, and adhesion keeps the drops in place.

Polarity

This is the atomic structure of Polarity. The red ball represents the negative charge, and the white represents the positive charges.

The pH Scale

The following diagram shows the pH scale and the pH of some common items. Chemicals that are very basic or very acidic are called “reactive.” The pH scale measures how acidic or basic a substance is. It ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic, and a pH greater than 7 is basic. Each whole pH value below 7 is ten times more acidic than the next higher value.

Cohesion, Surface Tension, and Adhesion

Cohesion causes water to form drops, surface tension causes them to be nearly spherical, and adhesion keeps the drops in place.

Polarity

This is the atomic structure of Polarity. The red ball represents the negative charge, and the white represents the positive charges.

The pH Scale

The following diagram shows the pH scale and the pH of some common items. Chemicals that are very basic or very acidic are called “reactive.” The pH scale measures how acidic or basic a substance is. It ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic, and a pH greater than 7 is basic. Each whole pH value below 7 is ten times more acidic than the next higher value.

Macromolecules

More Information

A macromolecule is a molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer. Some examples of macromolecules are synthetic polymers (plastic, synthetic fibers, and synthetic rubber), graphene, and carbon nanotubes. Natural molecules are for example the bio-polymers such as DNA, carbohydrates, proteins and lipids, or polyphenols.

It's Everywhere!

Chemistry is used in our everyday lives even when we don't know it. So take a minute and examine, and learn about Chemistry!